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Author (up) Alexandre, D.; Linhares, R.T.; Queiroz, B.; Fontoura, L.; Uchoa, A.F.; Samuels, R.I.; Macedo, M.L.; Bezerra, C.S.; Oliveira, E.M.; Demartini, D.R.; Carlini, C.R.; Silva, C.P. url  doi
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  Title Vicilin-derived peptides are transferred from males to females as seminal nuptial gift in the seed-feeding beetle Callosobruchus maculatus Type Journal Article
  Year 2011 Publication Journal of Insect Physiology Abbreviated Journal J Insect Physiol  
  Volume Issue Pages  
  Keywords  
  Abstract The fate of vicilins ingested by Callosobruchus maculatus and the physiological importance of these proteins in larvae and adults have been recently investigated. Vicilins have been demonstrated to be absorbed through the midgut epithelium, circulate in their trimeric form in the haemolymph and are deposited in the fat body. In fat body cells of both sexes, vicilins are partially hydrolyzed and the fragments are eventually deposited in the eggs. Tracking the fate of FITC-labelled vicilins in adult males revealed that the labelled vicilin fragments were also detected in oocytes and eggs, when the males copulated with non-labelled females. Based on the results presented here, we propose that following absorption, vicilins accumulate in the fat body, where they are partially degraded. These peptides are retained throughout the development of the males and are eventually sequestered by the gonads and passed to the female gonads during copulation. It is possible that accumulation in the eggs is a defensive strategy against pathogen attack, as these peptides are known to have antimicrobial activity. The contribution of vicilin-derived peptides from seminal fluids may be an investment that helps to increase the offspring survival. This study provides additional insights into the possible contributions of males to female fecundity following copulation in C. maculatus.  
  Address Departamento de Bioquimica, Centro de Ciencias Biologicas, Universidade Federal de Santa Catarina, 88040-900 Florianopolis, SC, Brazil  
  Corporate Author Thesis  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-1910 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:21420973 Approved no  
  Call Number North Georgia @ srsonger @ Serial 17  
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